使用指令将组件动态添加到子元素 [英] Add a component dynamically to a child element using a directive

问题描述

尝试使用指令将组件动态放置到子元素.

组件(作为模板):

@Component({选择器:'ps-工具提示'，模板:`<div class="ps-tooltip"><div class="ps-tooltip-content"><span>{{content}}</span>

`})导出类 TooltipComponent {@输入()内容:字符串；}

指令:

import { TooltipComponent } from './tooltip.component';@指示({选择器:'[ps-工具提示]'，})导出类 TooltipDirective 实现 AfterViewInit {@Input('ps-tooltip') 内容:字符串；私有工具提示:ComponentRef;构造函数(私有 viewContainerRef: ViewContainerRef,私有解析器:ComponentFactoryResolver，私有 elRef: ElementRef,私有渲染器:Renderer) { }ngAfterViewInit() {//给el添加触发器类this.renderer.setElementClass(this.elRef.nativeElement, 'ps-tooltip-trigger', true);//好的//工厂补偿解析器让工厂 = this.resolver.resolveComponentFactory(TooltipComponent);//创建组件this.tooltip = this.viewContainerRef.createComponent(工厂);控制台日志(this.tooltip)；//设置组件内容this.tooltip.instance.content = this.content 作为字符串；}}

问题是这是在创建一个兄弟姐妹，而我想要一个孩子(见下文)

结果:

<span>按钮</span></a><ps-tooltip>...</ps-tooltip>

想要的结果:

<span>按钮</span><ps-tooltip>...</ps-tooltip></a>

预先感谢您的帮助！

解决方案

即使动态组件作为 subling 元素插入，您仍然可以使用以下方法将元素移动到所需位置:

this.elRef.nativeElement.appendChild(this.tooltip.location.nativeElement);

Plunker 示例

Trying to place a component dynamically to a child element, using a directive.

The component (as template):

@Component({
  selector: 'ps-tooltip',
  template: `
    <div class="ps-tooltip">
      <div class="ps-tooltip-content">
        <span>{{content}}</span>
      </div>
    </div>
  `
})
export class TooltipComponent {

  @Input()
  content: string;

}

the directive:

import { TooltipComponent } from './tooltip.component';

@Directive({
  selector: '[ps-tooltip]',
})
export class TooltipDirective implements AfterViewInit {

  @Input('ps-tooltip') content: string;

  private tooltip: ComponentRef<TooltipComponent>;

  constructor(
      private viewContainerRef: ViewContainerRef,
      private resolver: ComponentFactoryResolver,
      private elRef: ElementRef,
      private renderer: Renderer
  ) { }

  ngAfterViewInit() {
    // add trigger class to el
    this.renderer.setElementClass(this.elRef.nativeElement, 'ps-tooltip-trigger', true); // ok

    // factory comp resolver
    let factory = this.resolver.resolveComponentFactory(TooltipComponent);

    // create component
    this.tooltip = this.viewContainerRef.createComponent(factory);
    console.log(this.tooltip);

    // set content of the component
    this.tooltip.instance.content = this.content as string;
  }
}

The problem is that this is creating a sibling and I want a child (see bellow)

result:

<a class="ps-btn ps-tooltip-trigger" ng-reflect-content="the tooltip">
  <span>Button</span>
</a>
<ps-tooltip>...</ps-tooltip>

wanted result:

<a class="ps-btn ps-tooltip-trigger" ng-reflect-content="the tooltip">
  <span>Button</span>
  <ps-tooltip>...</ps-tooltip>
</a>

Thanks in advance for your help!

解决方案

Even dynamic component is inserted as subling element you can still move element to desired place by using:

this.elRef.nativeElement.appendChild(this.tooltip.location.nativeElement);

Plunker Example

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